Basepairs involving Sugar(S) edge of Adenine and Hoogsteen(H) edge of Guanine is shown. Highlighted examples are found from RNA crystal structures obtained from PDB.

Base pairs stabilized by C-H...N/O interactions along with N-H...N/O hydrogen bonds

Basepair

(type & Orientation)

*Frequency

Example

Hydrogen bonding atoms with their precursors

A:G z:h Cis

0

Optimized Model Structure

C6-N3...N7-N9

C6-C2...O6-N1

A:G z:h Trans

0

Optimized Model Structure

C5-N3...O6-C1

C6-C2...N7-N9

* 1st and 2nd numbers in Frequency column represent the numbers of occurences as base pairs and as base triplets, respectively.